I stacked 15 sheets of isocyanate insulation (rigid insulation boards) back on my property and my chickens found it immediately and pecked the edges of it to pieces. I don't see any pieces on the ground, so it would appear that they ingested it. None have died yet and they do not seem to be acting any differently. I know it is a shot in the dark........but any suggestions other than wait and see? Should I not eat eggs from these birds??